As one of those CS reps, I have never picked that habit up. I only do something akin to that if I am uncertain. I agree it can be very annoying.
I always assumed it was a company policy?? And people were trained to do that. It seemed to make its appearance a few years back. All at once across the board.
I ordered a balance charger that was missing the cables, so I am unable to power it or to charge a battery
Take a pic of what the power cable looks like (the end that plugs into the charger of course) because I probably have
dozens of such cables just laying about and can likely give you one, or several.